MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 48fd4fd73407d231c743814c66298349b0a79f82409490efd963578b9225de88. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.

Database Entry


QuasarRAT


Vendor detections: 10


Intelligence 10 IOCs YARA 18 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 48fd4fd73407d231c743814c66298349b0a79f82409490efd963578b9225de88
SHA3-384 hash: 5f40a659c253580fed5ebfa23dcb472baa06b2c6c7806ed22a24a6228b2887428ac2a99cd6981deda102f9f67885c04e
SHA1 hash: 6bb03297dc202797f294c20446e5ffcbdc0bef58
MD5 hash: 6df81c5e540b40f2ebbd2486968b3019
humanhash: yellow-social-october-may
File name:FCFUB.exe
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:983'040 bytes
First seen:2022-07-19 14:02:52 UTC
Last seen:2022-07-19 14:53:04 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'658 x AgentTesla, 19'469 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 24576:eglkvdgsahyvwvp1dLdO/Wie2h7DUwE7ZHSvy65ku/9lTfACb:ZlzsahyvSXdxOuiebH5EB/DjAC
Threatray 350 similar samples on MalwareBazaar
TLSH T1F325F1DD366071EEC853C4718A582D78AA953CBB831B4107D0277EABBA3C597DF184B2
TrID 30.2% (.EXE) Win64 Executable (generic) (10523/12/4)
18.9% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
14.4% (.EXE) Win16 NE executable (generic) (5038/12/1)
12.9% (.EXE) Win32 Executable (generic) (4505/5/1)
5.9% (.EXE) Win16/32 Executable Delphi generic (2072/23)
File icon (PE):PE icon
dhash icon 78c0db4cea7aa0fc (33 x AveMariaRAT, 23 x QuasarRAT, 1 x Loki)
Reporter pr0xylife
Tags:exe QuasarRAT

Intelligence

File Origin
# of uploads :
3
# of downloads :
261
Origin country :
n/a
Vendor Threat Intelligence
Detection:
QuasarRAT
Create hunting rule
Link:
https://www.capesandbox.com/analysis/291883/
Detection(s):
PUA.Win.Packed.ConfuserEx-6391397-0
Create hunting rule

PUA.Win.Packed.ConfuserEx-6582917-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Unauthorized injection to a recently created process
Creating a file
Searching for synchronization primitives
Launching the default Windows debugger (dwwin.exe)
Sending a custom TCP request
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
80%
Tags:
confuserex packed
Link:
https://www.filescan.io/uploads/62d6ba4def2b0e63a82643b2/reports/df4b198f-11f5-40c9-9df7-ef305e2815f8/overview
Result
Verdict:
UNKNOWN
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/a8b69331-7be0-4352-a091-9d3f24c1b981
Result
Threat name:
Quasar
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1036549
Signature
.NET source code references suspicious native API functions
C2 URLs / IPs found in malware configuration
Detected unpacking (changes PE section rights)
Hides that the sample has been downloaded from the Internet (zone.identifier)
Icon mismatch, binary includes an icon from a different legit application in order to fool users
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
May check the online IP address of the machine
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
PE file contains section with special chars
PE file has nameless sections
Snort IDS alert for network traffic
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected Generic Downloader
Yara detected Quasar RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 669042 Sample: FCFUB.exe Startdate: 19/07/2022 Architecture: WINDOWS Score: 100 57 www.dnuocc.com 2->57 59 dnuocc.com 2->59 67 Snort IDS alert for network traffic 2->67 69 Multi AV Scanner detection for domain / URL 2->69 71 Malicious sample detected (through community Yara rule) 2->71 73 9 other signatures 2->73 11 FCFUB.exe 1 2->11         started        15 FCFUB.exe 2->15         started        signatures3 process4 file5 51 C:\Users\user\AppData\Local\...\FCFUB.exe.log, ASCII 11->51 dropped 89 Detected unpacking (changes PE section rights) 11->89 91 May check the online IP address of the machine 11->91 93 Uses schtasks.exe or at.exe to add and modify task schedules 11->93 17 FCFUB.exe 15 4 11->17         started        95 Injects a PE file into a foreign processes 15->95 22 FCFUB.exe 3 15->22         started        signatures6 process7 dnsIp8 53 ip-api.com 208.95.112.1, 49754, 49770, 49771 TUT-ASUS United States 17->53 55 192.168.2.1 unknown unknown 17->55 49 C:\Users\user\AppData\Roaming\silk\ccre.exe, PE32 17->49 dropped 75 Hides that the sample has been downloaded from the Internet (zone.identifier) 17->75 24 ccre.exe 1 17->24         started        27 schtasks.exe 1 17->27         started        29 ccre.exe 22->29         started        31 schtasks.exe 1 22->31         started        file9 signatures10 process11 signatures12 79 Multi AV Scanner detection for dropped file 24->79 81 Detected unpacking (changes PE section rights) 24->81 83 May check the online IP address of the machine 24->83 85 Machine Learning detection for dropped file 24->85 33 ccre.exe 24->33         started        35 conhost.exe 27->35         started        87 Injects a PE file into a foreign processes 29->87 37 ccre.exe 2 29->37         started        41 conhost.exe 31->41         started        process13 dnsIp14 43 WerFault.exe 33->43         started        61 dnuocc.com 193.233.188.5, 49772, 49773, 49776 REDCOM-ASRedcomKhabarovskRussiaRU Russian Federation 37->61 63 www.dnuocc.com 37->63 65 ip-api.com 37->65 77 Hides that the sample has been downloaded from the Internet (zone.identifier) 37->77 45 schtasks.exe 37->45         started        signatures15 process16 process17 47 conhost.exe 45->47         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/48fd4fd73407d231c743814c66298349b0a79f82409490efd963578b9225de88/
Threat name:
ByteCode-MSIL.Trojan.Cryptos
Create hunting rule
Status:
Malicious
First seen:
2022-07-19 14:03:08 UTC
File Type:
PE (.Net Exe)
Extracted files:
3
AV detection:
24 of 26 (92.31%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=jd6u7vzua7jddr2dqfggmkmdjgykph4cickjb36zmnlyxerf32ea._file
Verdict:
malicious
Similar samples:
189dfc7eca70dc08e242e9079d35198826b189f27e919aaf13c4482a763ae1a3
QuasarRAT
66c0b3969424c37bc46498d8f51e9cd6c82ac5a66b50302fa1d13a4ac2d82e6d
QuasarRAT
695722bddb32724a102d8d12aca0ebc841c4944f52632c3ea595941a6e988759
QuasarRAT
6ff685e5acfd946101b558f9f9d47a0d515c62e7476f5f83694609d64343315e
QuasarRAT
8b21d5d222c521b730f85690aa3f88c00b2c9ce7e8b208564509e093b5eed814
QuasarRAT
8bac0ee2a1a7858211a41dfe6a7acada857da2550c4ac3223a240dfdc3089099
QuasarRAT
b2cc06da4ded75a02683e73536f3a0af671b55bc28c9a2627d7afdaac66b9e32
QuasarRAT
f4070df8414261f9d218626189c7d3c303457fc6ea442ea413a42131f57cca21
QuasarRAT
f50557dca4c312d9794ba3835b70e2062a0c0103bb01a309dc48572e2ece4da8
QuasarRAT
+ 340 additional samples on MalwareBazaar
Result
Malware family:
quasar
Create hunting rule
Score:
  10/10
Tags:
family:quasar botnet:nop persistence spyware suricata trojan
Link:
https://tria.ge/reports/220719-rcnzwsdec4/
Behaviour
Creates scheduled task(s)
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Adds Run key to start application
Looks up external IP address via web service
Executes dropped EXE
Quasar RAT
Quasar payload
suricata: ET MALWARE Common RAT Connectivity Check Observed
Malware Config
C2 Extraction:
dnuocc.com:64594
www.dnuocc.com:64594
Unpacked files
SH256 hash:
824970900de371c68b36d852674799325ff72123b56201349c27601381f125dd
MD5 hash:
8561b44c2cfdc5bc8a53e72351373c4b
SHA1 hash:
fe0f79369b44d95487581e2eb6a29a0053106add
Link:
https://www.unpac.me/results/cc4d61f3-63ca-48ca-9764-c2dd90d420fb/
SH256 hash:
40656e06749a261e508953706cff73cf61dddf03d511a8d46dd4dc1ce25fe912
MD5 hash:
5024d622acd60bee2513bfb034cc589d
SHA1 hash:
bccc01c9e390c7079d179bd20ddccbda15f91011
Link:
https://www.unpac.me/results/cc4d61f3-63ca-48ca-9764-c2dd90d420fb/
SH256 hash:
48fd4fd73407d231c743814c66298349b0a79f82409490efd963578b9225de88
MD5 hash:
6df81c5e540b40f2ebbd2486968b3019
SHA1 hash:
6bb03297dc202797f294c20446e5ffcbdc0bef58
Link:
https://www.unpac.me/results/cc4d61f3-63ca-48ca-9764-c2dd90d420fb/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.55
Link:
https://yomi.yoroi.company/submissions/48fd4fd73407d231c743814c66298349b0a79f82409490efd963578b9225de88

YARA Signatures

MalwareBazaar uses YARA rules from several public and non-public repositories, such as YARAhub and Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious process dumps they may create. Please note that only results from TLP:CLEAR rules are being displayed.

Rule name:CN_disclosed_20180208_KeyLogger_1
Create hunting rule
Author:Florian Roth
Description:Detects malware from disclosed CN malware set
Reference:https://www.virustotal.com/graph/#/selected/n120z79z208z189/drawer/graph-details
Rule name:CN_disclosed_20180208_KeyLogger_1_RID3227
Create hunting rule
Author:Florian Roth
Description:Detects malware from disclosed CN malware set
Reference:https://www.virustotal.com/graph/#/selected/n120z79z208z189/drawer/graph-details
Rule name:INDICATOR_EXE_Packed_ConfuserEx
Create hunting rule
Author:ditekSHen
Description:Detects executables packed with ConfuserEx Mod
Rule name:INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
Create hunting rule
Author:ditekSHen
Description:Detects Windows executables referencing non-Windows User-Agents
Rule name:INDICATOR_SUSPICIOUS_GENInfoStealer
Create hunting rule
Author:ditekSHen
Description:Detects executables containing common artifcats observed in infostealers
Rule name:malware_Quasar_strings
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect QuasarRAT in memory
Rule name:MALWARE_Win_QuasarRAT
Create hunting rule
Author:ditekSHen
Description:QuasarRAT payload
Rule name:MAL_QuasarRAT_May19_1
Create hunting rule
Author:Florian Roth
Description:Detects QuasarRAT malware
Reference:https://blog.ensilo.com/uncovering-new-activity-by-apt10
Rule name:MAL_QuasarRAT_May19_1_RID2E1E
Create hunting rule
Author:Florian Roth
Description:Detects QuasarRAT malware
Reference:https://blog.ensilo.com/uncovering-new-activity-by-apt10
Rule name:pe_imphash
Create hunting rule
Rule name:Quasar_RAT_1
Create hunting rule
Author:Florian Roth
Description:Detects Quasar RAT
Reference:https://www.pwc.co.uk/cyber-security/pdf/cloud-hopper-annex-b-final.pdf
Rule name:Quasar_RAT_1_RID2B54
Create hunting rule
Author:Florian Roth
Description:Detects Quasar RAT
Reference:https://www.pwc.co.uk/cyber-security/pdf/cloud-hopper-annex-b-final.pdf
Rule name:Quasar_RAT_2
Create hunting rule
Author:Florian Roth
Description:Detects Quasar RAT
Reference:https://www.pwc.co.uk/cyber-security/pdf/cloud-hopper-annex-b-final.pdf
Rule name:Quasar_RAT_2_RID2B55
Create hunting rule
Author:Florian Roth
Description:Detects Quasar RAT
Reference:https://www.pwc.co.uk/cyber-security/pdf/cloud-hopper-annex-b-final.pdf
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:Vermin_Keylogger_Jan18_1
Create hunting rule
Author:Florian Roth
Description:Detects Vermin Keylogger
Reference:https://researchcenter.paloaltonetworks.com/2018/01/unit42-vermin-quasar-rat-custom-malware-used-ukraine/
Rule name:xRAT_1
Create hunting rule
Author:Florian Roth
Description:Detects Patchwork malware
Reference:https://goo.gl/Pg3P4W
Rule name:xRAT_1_RID2900
Create hunting rule
Author:Florian Roth
Description:Detects Patchwork malware
Reference:https://goo.gl/Pg3P4W

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Cape
Cape
https://www.capesandbox.com/analysis/291883/

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